PDF malware analysis — malicious · a619d57d0157f3f4

MALICIOUS

PDF

38.4 KB Created: 2021-07-06 03:10:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 68f475ba7d7e80522220100526fa364a SHA-1: a9f20f875d6d5f05951ef5734cc576aa55f27a28 SHA-256: a619d57d0157f3f4d0380f2f6da165fb367e8752b3a8ea8b2c351b7a3b925fa8

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://netcdn.tw/app/431946152/free-robux-redeem-codes-2021-game-hack PDF link annotation
- https://zarco.co.in/uploaded_files/userfiles/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-online-free-sign-up_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/robux-cheat-codes_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/pick-a-side-hack-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/dlls-for-roblox-hacks_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/comment-ont-fais-pour-avoir-un-cheat-sur-robloxcheat-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/beach-house-roleplay-roblox-hack_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/shotgun-willy-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/alphalife-roblox-cheats_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-outrageous-and-robux-earrapr_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-free-animations-ninja_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003cc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3CC9	22796 bytes
SHA-256: `31362dc93d4048739f3cbb6d52223507105d58c3d6b222d377991f510f324c92`
`font_01_sfnt_off00006ff8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FF8	19552 bytes
SHA-256: `9e1dac473263c0de9d7d37a0c1ac97fc6faf5ff8611277a673aaa799431b51c3`

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